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Search for pairs of muons with small displacements in pp collisions at s=13 TeV with the ATLAS detector

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Resumo:A search for new phenomena giving rise to pairs of opposite electrically charged muons with impact parameters in the millimeter range is presented, using \( 139 \text{ fb}^{-1} \) of \( \sqrt{s} = 13 \) TeV pp collision data from the ATLAS detector at the LHC. The search targets the gap in coverage between existing searches targeting final states with leptons with large displacement and prompt leptons. No significant excess over the background expectation is observed and exclusion limits are set on the mass of long-lived scalar supersymmetric muon-partners (smuons) with much lower lifetimes than previously targeted by displaced muon searches. Smuon lifetimes down to 1 ps are excluded for a smuon mass of 100 GeV, and smuon masses up to 520 GeV are excluded for a proper lifetime of 10 ps, at 95\% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.
Autores principais:Castro, Nuno Filipe
Outros Autores:Onofre, A.; ATLAS Collaboration
Assunto:Ciências Naturais::Ciências Físicas
Ano:2023
País:Portugal
Tipo de documento:artigo
Tipo de acesso:acesso aberto
Instituição associada:Universidade do Minho
Idioma:inglês
Origem:RepositóriUM - Universidade do Minho

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